Integrated energy and environment method for producing aromatic dicarboxylic acids by oxidation

摘要

A continuous process for oxidizing a di-alkyl-substituted aromatic compound with compressed air in a primary bubble column reactor, the process comprising the steps of: Transferring the post-oxidized reaction medium to overhead gas and underflow slurry; collecting overhead gas from the oxidation reactor and degassing unit and combining the combined overhead gas into a water removal tower (WRC) Transporting the underflow slurry from the degassing unit to the digestion unit for further oxidation without adding air to the digestion unit; moving overhead gas to the water removal tower; final oxidized slurry Crystallizing the slurry; and filtering the slurry through a rotary pressure filter. At that time, involves using some of the energy of the exhaust gas from the WRC, to drive the air compressor for supplying compressed air for oxidation.